"Marvel's Agents of SHIELD" hasn't even premiered yet, and it's already added a new recurring cast members. The latest person to join the growing family on the ABC drama is "World War Z" actress Ruth Negga.

Black Film broke the news, saying Negga will play a mystery role in a recurring arc on "Marvel's Agents of SHIELD." She definitely doesn't appear in the pilot episode, so Negga will likely make her debut a few episodes in to Season 1.

Also new to the "Agents of SHIELD" family are Ian Hart and David Conrad as SHIELD science officers. Meanwhile, "Firefly" alum Ron Glass will make his debut in the "Marvel's Agents of SHIELD" pilot.

"Marvel's Agents of SHIELD" will premiere on ABC on Sept. 24 at 8 p.m. Will you be tuning in to see Marvel's first foray into live action television?